v0.1.1 — Initial Release

Initial Release

Fallow is a Rust-native dead code analyzer for JavaScript and TypeScript projects — a faster alternative to knip, achieving 25-50x speedups on real-world codebases by leveraging the Oxc parser ecosystem.

Features

• 10 detection types: unused files, exports, types, dependencies, devDependencies, enum members, class members, unresolved imports, unlisted dependencies, duplicate exports
• Re-export chain resolution through barrel files with cycle detection
• 17 framework presets: Next.js, Vite, Vitest, Jest, Storybook, Remix, Astro, Nuxt, Angular, Playwright, Prisma, ESLint, TypeScript, Webpack, Tailwind, GraphQL Codegen, React Router
• Workspace support: npm, yarn, and pnpm workspaces (including pnpm-workspace.yaml)
• Auto-fix: remove unused exports and dependencies with fallow fix (supports --dry-run)
• Watch mode: file watcher with debounced re-analysis
• LSP server: real-time diagnostics, code actions, and quick fixes in your editor
• Multiple output formats: human, JSON, SARIF, compact
• Incremental caching: bincode cache with xxh3 hashing for fast re-analysis
• Baseline support: --save-baseline / --baseline for gradual adoption
• --changed-since: analyze only files changed since a git ref
• AI-agent friendly: schema command and structured JSON output for tool integration

Installation

npm install -g fallow
# or
cargo install fallow-cli

Performance

Syntactic analysis only — no TypeScript compiler dependency. Parallel parsing via rayon + oxc_parser. Flat edge storage with contiguous Vec<Edge> for cache-friendly traversal.

npm Distribution

Platform-specific binaries via optional dependencies for macOS (x64/ARM), Linux (x64/ARM, glibc/musl), and Windows (x64).

Full Changelog: https://github.com/BartWaardenburg/fallow/commits/v0.1.1